For example, http://myblog.com/page/mycompany’s-landing-page will be detected as http://myblog.com/page/mycompany

Punctuation at the end of a URL will not be detected as part of the URL.

For example, http://site.com/urlwithperiod. will be detected as http://site.com/urlwithperiod

Note that if you auto-publish from the COS, you will not encounter these issues. This is only when publishing directly via the social media tool in HubSpot. To avoid these issues, if the URL is from your own website, try using a URL without these special characters. If the URL is not your own, you can try copying the URL from the Chrome URL bar and pasting it into the composer which will properly format the URL and allow the full link to be detected.